Photos CR NA

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Cr na. 2cr + .... = Cr2o3 + h2. Cr2o3 NAOH. Cr2(so4)= CR(Oh)3. CR so4 3 CR Oh.
2cr + .... = Cr2o3 + h2. Cr2o3 NAOH. Cr2(so4)= CR(Oh)3. CR so4 3 CR Oh.

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